Gas mixer



J. NEEDHAM.

GAS MIXER.

APPLICATION FILED JAN. n, 1921.

1,41 1,063. Patented Mar. 28, 1922.

/0 I /q l7 5 7 I i g. 31

amvowto v Jseph Meedham v 35 his 61mm PW??? JOSEPH NEEDHAM, OF PASSAI C,NEW JERSEY.

Gas mxm Specification of Letters Patent.

Application filed January 8, 1921. Serial No. 485,826.

To all whom it may concern:

Be it known that I, JOSEPH NEEDHAM, a

- subject of the King of Great Britain,and

' particularly to devices of this class adapted for use in connectionwith fuel gas furnaces and like appliances, and the object of theinvention is to provide a device of the class specified composed of asuitable body portion having a fuel chamber,a mixing chamber formedtherein with an air chamber therebetween and an adjustable tubularmember which forms a part of the mixing chamber of the device, and whichis provided with an outwardly flaring throat in connection with which afuel discharge device or nozzle, in communication with the fuel chamber,operates, and with this and other objects in view the invention consistsin a device of the class and for the purpose specified which is simplein construction and operation, and which is constructed as heremafterdescribed and claimed.

The invention described and claimed herein is an improvement on thatdescribed and claimed in a' prior patent granted to me October 19, 1920,No. 1,355,998, and is fully disclosed in the following specification, ofwhich the accompanying drawing forms a part, in which the separate partsof my improvement are designated by suitable reference characters ineach of the views, and in which Fig. 1 is a plan view of my improved gasa mixing device;

Fig. 2 a section on the line 2-2 of Fig. 1; and,

Fig. 3 a view similar to Fig. 2 but showing a slight modification.

n the construction shown in Figs. 1 and 2, my improved gas mixing devicecomprises a body portion 5 composed of se arate parts 6 and 7, the part6 being provided with a fuel chamber 8 having an intake port 9 and adischarge nozzle 10. The part 7 istubular in form and provided with'amixing chamber 11, one end of the part 7 is provided with an enlargedhead 12 and the ad jacent end of the part 6 with a similar head13'having'arms 14 extending in the direction of the head 12 andby meansof which the separate heads 12 and 13 are connected by bolts or screws15 passed through the head 12 and into the arms 14; This constructionforms an air space 16 between the separate parts 6 and 7, or between thedischarge nozzle 10 of the fuel chamber and the mixing chamber 11.

A tubular member 17 is adjustably mounted- 1n the part 7 of the deviceand partially forms the mixing chamber 11 of said part 7, clearly shownin Fig. 2 of the drawing and the throat 18 of said mixing chamber flaresoutwardly asshown at 19 into the air space 16, and said end of thetubular member 17 is provided withan enlarged head 20, in

the periphery of which are spaced apertures 21 adapted to recelve aspanner wrench'or Patented Mar. 28, 1922.

the like to permit of the adjustment of said tubular member in the part7. p

It will be noted that in Fig. 3 of the drawng, the body portion 5 of thedevice is made 1n one piece, or the ends 6 and 7 are made integral, andwith this exception the remalnder of the device is the same as thatshown in Figs. 1' and 2.

It will be noted that in both forms of the construction shown, thedischarge nozzles 10 are detachably mounted in the body portion as arealso the tubular members 17, and these members are also adjustablymounted in the end or part 7 of the device whereby the position of thethroat 18 of the mixing chamber 11 relatively to the nozzle 10 may beregulated so as to control the entrainment of air through said throatinto the mixing chamber in the passage of high pressure fuel throughsaid nozzle.

It will be apparent that while I have shown certain details ofconstruction for carrying my invention into effect, I am not necessarilylimited to these details, and varlous changes in and modifications ofthe construction herein shown and described may be made, within thescope of the appended claims, without departing from the spirit of myinvention or sacrificing its advantages.

Having what I claim as new and desire to secure by Letters Patent, is:-

1. A device of the class described comprising a suitable body portionhaving a fuel chamber, a mixing chamber and an air fully described myinvention,

tably adjustable in the body portion and form-' ber at the other endportion thereof and between which and said fuel chamber is an air space,a fuel discharge device detachably connected with said body portion andin communication with said fuel chamber, a tubular member adjustablymounted in said body portion and extending into the mixing chamber andforming part thereof and provided with a reduced and outwardly flaringthroat, the position of which relatively to said fuel discharge devicewill control the entrainment of air into said mixing chamber throughsaid throat.

3. A device of the class described comprising a suitable body portionhaving a fuel chamber at one end thereof and a mixing chamber at theother end thereof, said fuel chamber and mixing chamber being joined byan air space, a tubular member adjustably mountedin' the body portionand being provided with an outwardly flaring throat which opens intothe'air space and said member being in communication with and forminpart of said mixing chamber, and a fue? discharge nozzle detachablymounted inconnection with the first named end of the body portion andextending into said air sp'ace, and a tubular member adjustabliy mountedin the last named end of the b0 y portion and extending into said mixmgchamber and forming part thereof, said 'tu ular member being providedwith an outwardly flaring throat which communicwtes with said air spacewhereby the adj ustment of said tubular member toward and .from saidfuel discharge device will control the entrainment of air into themixing chamber through said throat.

In testimony that I claim the foregoing as my invention have signed myname in presence of the subscribing witnesses this 5th day of January,1921.

JOSEPH NEEDHAM.

WVitnesses:

C. E. MULREANY, H. E. THOMPSON.

